Open AccessEffect of transmittance on luminescence properties of phosphor-in-glass for LED packaging
Author(s) -
Yurian Kim,
Sunil Kim,
Fauzia Iqbal,
H. Yie,
Hyung Sun Kim
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.000a43
Subject(s) - transmittance , materials science , integrating sphere , luminescence , phosphor , optics , scanning electron microscope , attenuation coefficient , porosity , spectrometer , light emitting diode , optoelectronics , porous glass , composite material , physics
The transmittance of phosphor-in-glass (PIG) color converter material was studied as a factor affecting the luminescence properties of light emitting diode packaging; it is closely related to the residual pores of sintered glass. In this study, the correlation between porosity and optical properties of the glass and PIG plates was investigated. The transmittance, luminescence properties, and porosity were measured by UV-visible spectrometer, integrating sphere and scanning electron microscope, respectively. Transmittance of the sintered glass plate and the luminous efficacy of the PIG plate both increase with decreased porosity, while the light scattering coefficient decreases. Luminescence properties such as emission intensity and color coordinates are also influenced by transmittance of the PIG plate.